A multidisciplinary study of the Gölbaşı-Harmanlı coal seam, SE Turkey

Karayi̇ǧi̇t, Ali̇ İhsan; Oskay, Rıza Görkem; Tuncer, Alaettin; Mastalerz, María; Gümüş, Burçin Aşkım; Şengüler, İlker; Yaradılmış, Hasan; Tünoğlu, Cemal

doi:10.1016/j.coal.2016.09.005

Cited by 17 publications

(7 citation statements)

References 63 publications

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“…Similar low %Rr values were also reported from the eastern part of the deposit (Oskay et al, 2016). These low values are either related to the existence of H-rich compounds in telohuminite macerals (e.g., resin and wax) and/or low-coalification degree of the analyzed samples (Stout and Spackman, 1989;Suárez-Ruiz et al, 1994;Bechtel et al, 2015;Karayiğit et al, 2016Karayiğit et al, , 2017aÇelik et al, 2017). The presence of H-rich compounds could suppress %Rr values not corresponding to real coalification degree; therefore, calorific values, moisture and ash yield could be more accurate in rank and grade determination (O'Keefe et al, 2013).…”

Section: Maceral Composition and Huminite Reflectancesupporting

confidence: 81%

“…The VI values range between 0.3 and 4.6 (Table 2, Figure 5b). The highest VI values are generally recorded in the upper part of the seam and suggest that preservation of vegetal tissues developed under relatively more acidic and reducing conditions; however, VI values < 1.0 indicate occasional dominance of herbaceous vegetation in the palaeomire (Kalaitzidis et al, 2004;Silva et al, 2008;Siavalas et al, 2009;Karayiğit et al, 2016). The GWI values vary from 0.3 to 2.0 which may suggest that the peat accumulation of the studied part of the deposit commenced under mesotrophic hydrological regime and turned into the alternations of mesotrophic and rheotrophic (GWI > 1) conditions.…”

Section: Discussionmentioning

confidence: 99%

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Coal features and depositional environment of the Northern Karapınar–Ayrancı coal deposit (Konya, Central Turkey)

Oskay¹,

Christanis²,

Salman³

2019

Turkish J Earth Sci

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Introduction Recent exploration by the Turkish General Directorate of Mineral Research and Exploration (MTA) proved several coal deposits hosted in Neogene sedimentary basins across the country. The most significant one due to its total geological reserves (around 1.8 Gt) is the Karapınar-Ayrancı coal deposit located at the southernmost of Central Turkey; the coal is planned to be exploited and used for feeding the thermal power plant to be installed nearby. During the late Cenozoic, regional tectonic movements caused the development of fault-controlled basins and volcanic activity in

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Section: Maceral Composition and Huminite Reflectancesupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Coal features and depositional environment of the Northern Karapınar–Ayrancı coal deposit (Konya, Central Turkey)

Oskay¹,

Christanis²,

Salman³

2019

Turkish J Earth Sci

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“…1 Coal are pyrite and siderite, both of which coexist in all coal and carbonaceous rock benches (Table 4). Framboidal pyrite, which generally indicate a reducing condition and an authigenic origin [64,75,[107][108][109][110][111], was identified in some samples investigated in this study ( Figure 11A,B).The pyrite with irregular shape was scattered in the matrix of siderite (Figure 16). Syngenetic pyrite is generally indicative of deposition in marine influenced environment or sulfate-rich lake waters or groundwaters [63,[101][102][103], and abundant siderite indicates non-marine, at least waters with a low sulfate content [103].…”

Section: Major Fe-bearing Mineralsmentioning

confidence: 73%

Mineralogical and Geochemical Compositions of the Lopingian Coals and Carbonaceous Rocks in the Shugentian Coalfield, Yunnan, China: with Emphasis on Fe-Bearing Minerals in a Continental-Marine Transitional Environment

Zheng

Wang

et al. 2017

Minerals

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This paper presents the mineralogical and geochemical compositions of coal benches and non-coal (carbonaceous rock benches, parting, roof and floor) samples from the No. 1 Coal in the Longtan Formation of the Permian-Lopingian epoch from the Shugentian Coalfield, eastern Yunnan Province, southwestern China. The coal is rich in Nb, Ta, Zr, and Hf, which were derived from the Kangdian Upland with the dominant compositions of the Emeishan basalt. The minerals identified in the samples include mixed-layer illite-smectite, kaolinite, quartz, siderite, and minor calcite, pyrite, anatase and ankerite. Albite and chamosite occur in the roof and floor samples. The parting sample (SGT1-2p) is characterized by abundant siderite (64.9%) and calcite (20.1%), and one carbonaceous rock sample SGT1-11 contained a large amount of pyrite (26.1%). Four factors were responsible for the geochemical and mineralogical compositions in the samples; namely, the terrigenous detrital materials transported from the Kangdian Upland, direct volcanic ash inputs, multi-stage inputs of hydrothermal fluids, and marine influences. The co-existence of siderite and pyrite was attributed to a continental-marine transitional environment.

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“…AG coal basin, which formed on Late Pliocene or Early Pliocene periods, is located in the East Anatolian Fault Zone of Turkey. 29 The location of AG lignite deposit is given in Figure 1.…”

Section: Lignite Samplementioning

confidence: 99%

Combustion kinetics of lignite preheated under oxygen-enriched conditions

Uğuz

Haykırı-Açma

Yaman

2019

Energy & Environment

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This study bases on the testing of the solid-state kinetic models to determine the combustion kinetics of thermally pretreated Turkish lignite (Adiyaman–Golbasi) in O2-enriched environment. The lignite sample was first preheated in a horizontal tube furnace at temperatures of 200°C, 400°C and 600°C that correspond to torrefaction, partly devolatilization and partly ashing temperatures. Oxidative environments that have the O2 concentrations of 21, 30, 40 and 50 vol.%. were created during this treatment by changing the ratio of O2/N2 in the binary gas mixtures. The solid residues remaining after oxidation were then subjected to non-isothermal combustion conditions in a thermal analyzer up to 900°C under dry air atmosphere. The conversion degrees calculated from the thermogravimetric analysis were used to establish the kinetic parameters based on the Coats–Redfern method. It was concluded that the first-order reaction model fits well for both the combustion of volatiles and the burning of the char. It was also seen that the concentration of O2 in the pre-oxidation stage plays an important role as treatment temperature also increases. Moreover, it was also concluded that the activation energies for the char burning regions of the samples treated at 200°C and 400°C differ seriously.

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A multidisciplinary study of the Gölbaşı-Harmanlı coal seam, SE Turkey

Cited by 17 publications

References 63 publications

Coal features and depositional environment of the Northern Karapınar–Ayrancı coal deposit (Konya, Central Turkey)

Coal features and depositional environment of the Northern Karapınar–Ayrancı coal deposit (Konya, Central Turkey)

Mineralogical and Geochemical Compositions of the Lopingian Coals and Carbonaceous Rocks in the Shugentian Coalfield, Yunnan, China: with Emphasis on Fe-Bearing Minerals in a Continental-Marine Transitional Environment

Combustion kinetics of lignite preheated under oxygen-enriched conditions

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